This is unfortunately the wrong area for such a question. If you want to know on which level and how a pokemon evolves, you can easily check various pokemon fansites on the internet. Scyther evolves when it carries the item metal coat and it's traded to another player. As at the current time pokemon neither can carry an item or be traded, you can't evolve Scyther yet. I'm sure this will be changed with an update in the future.